updates on the layout

exercises/exercise-basic/README.md

@@ -88,7 +88,11 @@ make exercise_basic_2pni # builds new executable
 
 * The following set-up should be realized:
 
-  __Boundary conditions:__ Dirichlet conditions at the left boundary. For the primary variable 'temperature' use a varying temperature of $`\displaystyle T(y) = 283~\text{K} + 0.03~\frac{\text{K}}{\text{m}} \cdot \left( d_\text{aquifer} - y \right) `$, with the aquifer depth $`\displaystyle d_\text{aquifer}=2700~\text{m}`$. Neumann no-flow for the energy balance in the rest of the boundaries.
+  __Boundary conditions:__ Dirichlet conditions at the left boundary. For the primary variable 'temperature' use a varying temperature of <br/>
+$`\displaystyle T(y) = 283~\text{K} + 0.03~\frac{\text{K}}{\text{m}} \cdot \left( d_\text{aquifer} - y \right) `$, <br/>
+with the aquifer depth <br/>
+$`\displaystyle d_\text{aquifer}=2700~\text{m}`$. <br/>
+Assign Neumann no-flow for the energy balance to the rest of the boundaries.
 
   __Initial conditions:__ The same temperature gradient as in the boundary conditions with an exception in the subdomain (20 < x < 30, 5 < y < 35), where you assign a constant initial temperature of 380 K.